Steam-heating apparatus.



G. P. CAMPBELL, STEAM HEATING APPARATUS. APPLICATION FILED JAN. 21,1909.

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STEAM HEATING APPARATUS. APPLIGATIO]! FILED JAN. 21, 1909.

946,333; Patentd Jan. 11,1910.

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G. P. CAMPBELL. A

STEAM HEATING APPARATUS. APPLICATION FILED JAN. 21, 1909.

Patented Jan. 11,1910.

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UNITED STATES PATENT ()FFICE.

GEORGE P. CAMPBELL, OF SGHENECTADY, NEW YORK.

STEAM-HEATING APPARATUS.

T 0 all whom it may concern:

Be it known that I, GEORGE P. CAMPBELL, a citizen of the United States,residing at Schenectady, county of Schenectady and State of New York,have invented certain new and useful Improvements in Steam- HeatingApparatus, of which the following is a specification.

The invention relates to such improvements and consists of the novelconstruction and combination of parts hereinafter described andsubsequently claimed.

Reference may be had to the accompanying drawings, and the referencecharacters marked thereon, which form a part of this specification.Similar characters refer to similar parts in the several figurestherein.

The principal objects of the invention are to secure in a heatingapparatus comprising an upright fire-pot and a superposed steamboiler, arelatively large heating arezt for the boiler; to secure a comparativelylong travel of the heated products of combustion in contact with thewater-table of the boiler; to construct the boiler in sections which canbe separately passed through comparatively narrow door-openings; andutilize the feedchute of the fire-pot as a part of a comparatively longgas-flue.

The invention is disclosed in the drawings and will be hereinafter fullydescribed and subsequently pointed out in the claims.

Figure 1 is a central, vertical section of the improved heatingapparatus. Fig. 2 is a horizontal section taken on the broken line 3-3in Fig. 1. Fig. 3 is a vertical section of a portion of the apparatustaken on the broken line 44: in Fig. 1. Fig. 4c is a horizontal sectionsimilar to that seen in Fig. 2, showing a modified form of construction.

The boiler is made of two sections, 1 and 2, adapted to be securedtogether by means of the screw-bolts, 3, inserted through a flange, 4,in the lower section, and into screwthreaded apertures in the thickenedportion, 5, of the upper section. The lower section is provided with theannular water-leg chamber, 7, the inner wall of which, 8, forms thevertical wall of the fire-pot. Situated at the lower end of the fire-potis the grate, 9, which may be made of any known form. The pot and boilerare mounted upon an ash-pit frame 10, provided with a door, 12, in theusual manner, and a water-supply Specification of Letters Patent.

Application filed January 21, 1909.

Patented J an. 11, 1910.

Serial No. 473,550.

the annular chamber, as shown, and the steam-pipe, 14, is inserted inthe upper part of the upper section of the boiler, as shown, adapted toconvey steam to radiators not shown. The water-leg of the boiler may beprovided with any desired number of strengthening plates 16. The uppersection of the boiler is provided with a central opening, 20, adapted toregister with the opening, 21, in the upper end of the water-legsection. The bottom wall of the upper section extends outwardly andupwardly from the opening, 20, to form an annular water-table, 22, theboiler being preferably filled with water approximately to the brokenline, 23, known as the water-line.

Depending from the peripheral portion of the upper section is a seriesof lugs, 24, and projecting upwardly from the peripheral portion of thelower end of the water-leg section is a corresponding series of lugs 25.Aiiixed to these lugs arranged at such intervals as may be desired arethe slats or bars, 27, secured by bolts 28. A casing, 30, preferably ofgalvanized sheet-metal, is made to inclose the fire-pot and thewater-table of the upper section, as shown, the case-wall being securedto the bars, 27, by screwthreaded bolts, 31, and nuts, 32, to form atight gaschamber, 34, within the casing. The water-leg of the lowersection may be still further strengthened, when desired, by flanges 35.There is projected laterally from the lire-pot a combined feed-chute andgasfiue, consisting of the rectangular conduit, 40, communicating withthe fire-pot through the lateral opening, %1, therein, the outer end ofthe conduit being closed by means of the door, 42, hinged thereon at 43.The conduit-frame is secured in position on its upper side by means ofthe screw-bolts, 44, which unite the same with lugs, 45, projecting fromthe web, 46, cast integral with the upper boiler-section. On the lowerside the flange, 47, is secured by bolt, 48, to the lug, 49, projectingfrom the web, 50, castintegral with the lower boiler-section. The sidewalls of the conduit forming the combined feedchute and gas-flue arerovided with oppositely disposed gas-out ets 51 and 52. The outlet, 52,is opened and closed by means of the valve, 53, fixed upon the pintle,54:, rotary in suitable bearings 56. The pintle projects out beyond thecasing, and is provided with a crank-handle 58. When the pipe, 13,enters the boiler at the lower end of 1 valve, 53, is closed, as shownby the solid then occupying the position shown by the circular dottedline in Fig. 2, which permits the door to he swung open to the positionshown by the dotted lines in Fig. '2.

The

gas-chamber formed by the casing, 30, is 5 divided above the feed-chuteby the parti- 1 tion, 46, which is a web cast integral with the uppersection of the boiler. 3elow the feed-chute the chamber is divided bythe partition-plate, 60, secured by rivets, G1, to the flange, 50, castintegral with the lower section of the boiler. The flange. (3?), is

formed integral with the plate, (30, and per- 1 forms the same functionas the bars. 27, in supporting the casmg.

The casing is provided with the outlet-thimble. (35, leading from thegas-chamber, 34E, to take off the products of combustion after they havepassed from the fire-pot into the feed-chute, through opening, 51, andaround the chamber beneath the water-table in the direction of thearrows in Fig. to such outlet. Such gases are taken through such outletto a smoke-stack or chimney, not shown. \Yhen desired, a smoke-outletleading from the gaschamber may be provided on the side of the apparatusopposite the door-opening of the feed-chute, as shown in Fig. at, inwhich the gas-outlet. T0, is located opposite the feedchute. Each of thegas-outlets, T0 and 65, are provided with a branch-pipe leading to thesmoke-pipe, 71, which in turn leads to a chimney or smoke-stack, notshown. The branch-pipes are each provided with a valve or damper bywhich such pipes can be closed, the pipe leading from the outlet, 65,having the damper, T2, and the pipe leading from the outlet, 70, havingthe damper T3. lVhen it is desired to use the outlet. '70, it onlynecessary to close the damper, 72, and open the valve. the damper. 7?,being open. 7

The products of combustion coming from the fire-pot after entering thefeed-chute will divide, part passing through the opening, and partthrough the openin 51, i

in the direction of the arrows shown in Fig.

4E, passing thence along the gas-chamber directly beneath thewater-table to the outlet,

T0, thence through such, outlet to the smokepipe leading to the chimney.It will thus be seen that the products of combustion do not travel thewhole length of the gas-flue in the gas-chamber, but travel halfsuchdistance, one-half the products of combustion going through opening, 51,in one direction,

and the other half through opening, 52, in the opposite direction. Sucha construction, by reducing the travel of the products of combustionone-half, tends to favor the draft through the tire-pot, and every partof the overhanging water-table is reached by such heated products ofcombustion on their way from the feed-chute to the gas-outlet 70. Wherethe natural draft is weak, such a form of construction will bepreferable to the form shown in Fig. 2. hen the draft is sufficient,then the heated products of combustion may be made to travel throughoutthe entire length of the water-table by closing the damper, 73, andvalve, 53, and opening damper 72. When the valve and dampers arearranged to divide the current and allow it to escape through outlet,70,-as seen in Fig. 4, it is obvious that no dividing partition, 60, isrequired to close the gastlue in the plane of the feed-chute.

The operation of the apparatus is as follows: hen it is desired toreplenish the fire-pot with coal by feeding the same through thefeed-chute, the valve, 53, is first opened by means of the crank-handle,58, thereby unlocking the door of the feedchute, which is then openedand the coal or other fuel inserted therein, after which the door isclosed. By opening the valve, 53, before the door, l2, is opened, thegases are taken by the natural draft out through the gas-outlet, 52,directly to the opening, 65, passing thence to the chimney, such draftwholly preventing the escape of any gases out through the end-opening ofthe chute, when the door, +L2, is opened. hen the door, 42, is closed,the valve, 53, can be opened without opening the door, when it isdesired to increase the draft through the fire-pot, as, for example,when fresh fuel is added, and closed again when it is desired to takethe heated products of combustion out through the gasoutlet, 51, andaround the gas-chamber beneath the water-table of the boiler to utilizethe heat in the products of combustion.

By having the water-table, 22, inclined upwardly and outwardly, theheated gases which naturally rise are distributed along the watertableand carried to the extreme outer portion thereof, which affords anexceedingly large heating area for transmitting heat to the water in theboiler, and the extended table also provides an exceedingly large areaof water-surface from which evaporation can take place.

By having the boiler-sections separable. and shaped substantially asdescribed, an exceedingly large boiler can be transported throughordinary doorways. which renders their introduction, into ordinarydwellings, feasible. When the sections are separated, the upper sectioncan be taken through a doorway by tipping the same over on edge.

And the casing being removed, the lower section of the boiler Willeasily pass through an ordinary doorway, whereby the diameter of theupper section can be made much greater than the width of ordinarydoorways.

hat I claim as new and desire to secure by Letters Patent is 1. In asteam-heating apparatus, the combination with an upright fire-potprovided at its upper end with a laterally projecting feed-chute havinga lateral gas-outlet; and a superposed steam-boiler having a watertableoverhanging the fire-pot on all sides; of a case inclosing the fire-poton all sides, coextensive, at its upper end, with and connected to theperiphery of the water-table, with its lower end closed around the lowerportion of the fire-pot, forming an annular chamberaround the fire-pot;vertical partitions for dividing such chamber both above and below thefeed-chute, whereby a gas-flue is formed leadin from the lateral openingin one side of the fled-chute around the fire-pot, immediately under theoverhanging portion of the water-table, to the opposite side of thefeed-chute; and means, located at the end of such flue, for carrying oilthe products of combustion.

2. In a steam-heating apparatus, the combination with an uprightfire-pot provided at its upper end with a laterally projectingfeed-chute having in each of its opposite sides a lateral gas-outlet;and a superposed steam-boiler having a water-table overhanging thefire-pot on all sides; of a case inclosing the fire-pot on all sides,forming an annular chamber beneath the overhangmg portion of thewater-table, extending around the firepot; vertical partitions fordividing such chamber both above and below the feedchute; a valve forclosing one of the gas outlets in the side walls of the feed-chute; andmeans for carrying oft the products of combustion from such flue,located on that side of the feed-chute having the valved gasoutlet.

3. In a steam-heating apparatus of the class described, a steam-boilercomposed of two separable sections, one section comprising an annularwater-leg, the inner wall of which forms the fire-pot and is providedwith a laterally projecting feed-chute, the other section beingsuperposed upon the water-leg section and detachably secured thereto,and provided with an annular upwardly flaring water-table overhangingthe water-leg section; and means for directing the products ofcombustion from the projecting part of the feed-chute horizontally alongthe under surface 01": the overhanging water-table and around thewater-leg.

4. In a steam-heating apparatus of the class described, the combinationwith a steam-boiler composed of two detachable sections, the lowersection consisting of a water leg surrounding the combustion chamber,with its inner wall forming the fire-pot, and provided with a laterallyextended feedchute and gas-flue combined, having a gasoutlet in one ofits side walls, the other boiler-section being superposed upon thewater-leg section and provided with an outwardly and upwardly flaringwater-table which overhangs the water-leg section; of a detachable caseinclosing the water-leg section and the water-table of the uppersection, forming a flue-chamber beneath the water-table surrounding thewater-leg section, with which the combustion-chamber is in communicationthrough the feed-chute and the gas-outlet in the chute-wall; uprightpartitions extending transversely of the fluechamber, in line with thefeed-chute; and means for taking ofl the products of com bustion fromthe flue-chamber, on the closed side of the feed-chute.

5. In a steam-heating apparatus, the combination with an uprightfire-pot provided with a laterally projecting feed-chute and gas-fluecombined, having oppositely disposed gasoutlets in its side walls; of asuperposed steam -boiler having an outwardly and upwardly projectingwater-table overhanging the upper end of the fire-pot on all sides; acasing inclosing the fire-pot and water-table of the boiler, therebyforming an inclosed chamber surrounding the fire-pot and directlybeneath the water-table of the boiler; means for dividing the chamheralong an upright plane passing through the feed-chute; means for openingand closing the outer end of the feedchute; means for opening andclosing one of the gasoutlets in the side walls of the feed-chute, theother gas-outlet opening from the feedchute into the gas-chambersurrounding the fire-pot; and means for taking gas from the gaschamberthrough the casing on the valved side of the feed-chute.

6. In a steam-heating apparatus comprising an upright fire-pot providedwith a laterally extended feed-chute and gas-flue combined, a superposedsteam-boiler having an outwardly extended water-table overhanging thefire-pot, and a chamber-inclosing case-wall surrounding the fire-pot andthe water-table, and forming a gas-chamber divided by upright partitionsin the plane of the feed-chute, the side walls of the feedchute havingoppositely disposed gas-outlets leading into the gas-chamber on oppositesides of the upright partitions, and means for taking oil gas from thegas-chamber through an outlet located on one side of the dividingpartitions; the combination with a valve for opening and closing thegas-outlet in the feed-chute wall, on the side of the upright partitionsneighboring the outlet from the gas-chamber; of a door for opening andclosing the outer end of the feedchute; and means for operating thevalve controlling the gas-outlet of the feed-chute, projectingexteriorly of the case and movable across the path of the door, outsideof the same, when the valve is closed, and movable beyond the path ofthe door when such valve is open, whereby the door can not be openedwhen the valve is closed.

7. In a steam-heating apparatus, the combination with an uprightfire-pot provided with a laterally projecting feed-chute and gas-fluecombined, having oppositely disposed gas-outlets in its side walls; of asuperposed steam-boiler supported by the firepot and having an outwardlyand upwardly projecting water-table overhanging the upper end of thefire-pot on all sides; a casing inclosing the fire-pot, water-table andgasoutlets in the sides of the feed-chute, thereby forming a gas-fluechamber surrounding the fire-pot and directly beneath the overhangingportion of the water-table of the boiler; means for opening and closingthe outer end of the feed-chute; and means for taking the gas from thefeed-chute horizontally around the fire-pot, along the upwardly-flaringunder surface of the watertable, and out through the casing.

S. In a steam-heating apparatus, the combination with a steam-boilermade in two separable sections, one section being superposed upon,supported by and overhanging the other section, the overhanging portionhaving an upwardly and outwardly-flaring under surface; of a fire-potsubjacent to the boiler; and means for circulating the products ofcombustion along the flaring under surface of the overhanging portion ofthe upper boiler-section, and horizontally around the lowerboiler-section.

9. In a steam-heating apparatus, the combination with a steam-boilercomposed of two separable sections, one section being superposed upon,supported by and overhanging the other section on all sides; of afirepot inclosed by the lower section and pro vided with a laterallyprojected feed-chute and gas-flue combined, having gas-outlets in itsprojecting side-walls; and means for horizontally circulating the heatedgases escaping from such gas-outlets along the under surface of theoverhanging portion of the upper boiler-section, and around the lowerboiler-section.

10. In a steam-heating apparatus, the combination with a fire-pot; of asteamboiler having a water-table overhanging the fire-pot on all sides;and means for horizontally circulating the products of combustion alongthe under surface of the overhanging portion of the boiler, and around 5the fire-pot.

In testimony whereof, I have hereunto set my hand this 19th day ofJanuary, 1909.

GEO. P. CAMPBELL. Vitnesses L. G. KENNEDY, GEO. A. MosHER.

